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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
1 in 7.5 Twist 257 Weatherby
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<blockquote data-quote="JTB" data-source="post: 1994224" data-attributes="member: 97196"><p>A 1:7.5 twist would be my choice for a 257 Weatherby and stay with heavies. I shoot the 131 Blackjacks in both a 25 CM and 25 PRC using RL26 from 1:7 twist barrels. The two (hunting and competition) CMs run about 3000 fps while the PRC is running 3260. Never had a blackjack fail but I have been told that 3300 is about the limit for the 131 in a 7 twist barrel. We use the 131 for hunting and competition and it has been flawless for both. Took two shots at our 2000 yard target a few days ago just wondering if my BC would hold when really stretched out. Saw no dust so wasn't sure it was even close. Drove down to take a look later that afternoon and both shots hit within 6 inches of each other on a 18" plate. I am ready to sink my 25 CM reamer another .100" and fire form some 260 brass for my hunting CM to see if I can push it a little more. I have no stock in blackjack but it has been a great performer and I order a box of 500 regularly. Would be nice to have 130-140gr Berger EOL, ELD-X, ABLR hunting options. I have some heavy Hammers on my shelf but haven't had time to work up a load. Since I tested the 131 Blackjack I have been all-in on the 1/4 bore.</p></blockquote><p></p>
[QUOTE="JTB, post: 1994224, member: 97196"] A 1:7.5 twist would be my choice for a 257 Weatherby and stay with heavies. I shoot the 131 Blackjacks in both a 25 CM and 25 PRC using RL26 from 1:7 twist barrels. The two (hunting and competition) CMs run about 3000 fps while the PRC is running 3260. Never had a blackjack fail but I have been told that 3300 is about the limit for the 131 in a 7 twist barrel. We use the 131 for hunting and competition and it has been flawless for both. Took two shots at our 2000 yard target a few days ago just wondering if my BC would hold when really stretched out. Saw no dust so wasn’t sure it was even close. Drove down to take a look later that afternoon and both shots hit within 6 inches of each other on a 18” plate. I am ready to sink my 25 CM reamer another .100” and fire form some 260 brass for my hunting CM to see if I can push it a little more. I have no stock in blackjack but it has been a great performer and I order a box of 500 regularly. Would be nice to have 130-140gr Berger EOL, ELD-X, ABLR hunting options. I have some heavy Hammers on my shelf but haven’t had time to work up a load. Since I tested the 131 Blackjack I have been all-in on the 1/4 bore. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
1 in 7.5 Twist 257 Weatherby
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